MRC TECH7 Ampac 760 User manual

Operating instructions for Models 760 and 780
As with any electrically operated unit, it is best to periodically
examine it and have any potentially hazardous part repaired or
replaced.
NOT RECOMMENDED FOR CHILDREN
UNDER 14 YEARS OF AGE
Model Ampac 760: Model Ampac 780:
INPUT: 120 VAC 60Hz INPUT: 120VAC 60 Hz
OUTPUT: 23 VDC, 18.5 VAC OUTPUT: 14.5 VDC – EACH THROTTLE
TOTAL OUTPUT: 20VA AT 10VA, 14.8 VAC
TOTAL OUTPUT: 20VA
©2021 Model Rectifier Corporation
360 Main Street, Suite 2
Matawan, NJ 07747
732-225-6360 www.modelrectifier.com
Updated: June 9, 2021
CAUTION – ELECTRICALLY
OPERATED PRODUCT
AS WITH ALL ELECTRICAL PRODUCTS,
PRECAUTIONS SHOULD BE OBSERVED
DURING HANDLING AND USE TO
REDUCE THE RISK OF ELECTRIC SHOCK.

You have purchased an advanced train control. The Tech 7 series offers
precise slow speed control and a high-grade housing for durability and
safety. We are confident that you will enjoy your Tech 7 for many years.
WARNING:
Children under the age of 14 must be supervised by an adult when operating
this product.
CONTROLS:
Power Switch: (Model 760 & 780) The master ON-OFF switch disconnects
the input power from you Tech7 and shuts the unit down completely.
Direction Switch: (Model 760 & 780) This switch reverses the polarity of
voltage applied to the track and thereby reverses the direction of your
locomotive. This switch should only be operated when the locomotive is not
moving to prevent damage to the locomotive mechanism.
Momentum Switch: (Model 760 only) The momentum switch in your Tech 7
unit, allows operation in either of two modes. With the switch in the OFF
position, a change in the throttle setting results in an immediate change in
locomotive speed. With the momentum switch in the ON position the
locomotive starts out more slowly like a real locomotive. This switch can
substantially add to your model railroading enjoyment. When a real
locomotive is given an increase in throttle setting there is a lag until the pre-
set speed is reached. The heavier the load of the cars being drawn, the
longer the lag time. Similarly, when braking a real locomotive, a
considerable distance is needed to stop. Since lightweight locomotives do
not mimic this delay on their own, momentum circuitry, as in this pack, is
used to create it electrically.
Pressure Sensitive Brake: (Model 760 only) The brake in your 760 is a push
switch. To operate the brake, push down on the switch. As you hold the
switch the locomotive will continue to slow down. If your throttle was left at
a setting other than 0, releasing the brake will cause the locomotive to
gradually accelerate to the speed determined by the throttle setting (as long
as the momentum is in the “ON” position).
Throttle Control: Tech 7 units have a throttle knob that is used to set the
speed of the locomotive. The 780 has two throttles, one for each output.
INDICATORS:
Pilot Light: Tech 7 units have a PILOT LIGHT that is a Light Emitting Diode
(LED). The LED will glow when the power switch is in the ON position. The
Model 780 has two pilot lights.
Momentum: (Model 760 only) Your Tech 7 is equipped with an LED
indicator to make you aware of when the momentum switch is in the ON

position. This LED will glow whenever momentum is engaged, even if the
locomotive is not moving.
Overload Indicator: (Model 760 only) In the event of a short circuit or
overload, the circuit protector will trip. Your overload indicator will light
giving a visual indication of a problem.
TERMINALS:
Variable D.C.: These terminals are for the attachment of your Tech 7 to the
mainline of your layout. If the direction of your locomotive does not match
the position of your direction switch, simply reverse the wires going to these
terminals.
Accessories A.C.: These terminals supply AC voltage for use with AC
accessories. Polarity does not matter.
Note: When connecting to any terminal, care must be taken that wire a does
not touch more than one terminal at a time. Loose wires are a danger to
your unit and layout. Be certain that wires are properly wrapped around
terminals before tightening screws. Also note that the output terminal
screws can get hot during periods of peak use.
FOR YOUR PROTECTION
•Never reverse a locomotive without stopping it first. To do so may
damage the locomotive motor.
•Never connect a locomotive to the A.C. terminals. This will damage
the locomotive.
•Turn OFF the power switch and remove line cord plug from your
home outlet at the end of each use.
•When a short circuit or current overload occurs and the circuit
protection device trips, place the Tech 7 ON-OFF switch in the OFF
position, place the throttle in the STOP position, and correct the
short or overload.
•Avoid prolonged overloads and short circuits. Tech 7 is equipped
with safety devices to prevent accidental damage due to these
conditions, but it is unwise to subject the unit to these frequently.
•Keep wheel and track surfaces clean. Dirty track and wheels can
cause intermittent operation.
The three-year limited warranty* does not include return shipping for
customers outside of the continental United States (including Hawaii, Alaska,
Canada, and Mexico).
Questions regarding the three-year limited warranty* policy or
troubleshooting issues can be directed to MRC Customer Support by calling
1-732-225-6360 from Monday to Friday, between 8:00 AM and 5:00 PM EST,
or by emailing mr[email protected]
To receive warranty service, we require a copy of the original sales receipt to
validate the warranty period. Include a note briefly describing the issues
along with your name, address, phone number, and email address.

*THREE YEAR LIMITED WARRANTY
Model Rectifier Corporation (MRC) will, subject to the conditions explained
and set forth below, repair at its expense, within three calendar years from
the date of sale, any component of this MRC product which is proven
defective by reason of improper workmanship or materials. MRC will repair
said component(s) without charge for necessary parts or labor. If the unit
cannot be repaired, it will be replaced with another unit or similar product of
equal or greater value.
CONDITIONS
1. Limitation to original purchaser and proof of date of purchase: The
obligations of MRC set forth herein shall only extend to the original
purchaser. The burden of proof as to the date of purchase is on the
purchaser, thus it is recommended that you retain your bill of sale
or sales receipt and include it with the return of your product,
keeping a copy of the same for your records. This bill of sale or sales
receipt must have the date of purchase and the name and address
of the dealer.
2. Validation of the Warranty: The validity of the above state warranty
is contingent upon purchaser possessing an original copy of the
sales receipt that shows the product’s name and/or model number,
purchase date, name of the dealer, and the address of the dealer.
The burden of proof rests with the purchaser of the product.
3. Exclusions from Warranty: The warranty does not apply to (a) any
marring, scratching, or defects in decoration and/or finish, (b) any
damage resulting from misuse, abnormal service, water, or weather
damage, (c) any damage incurred in shipping and handling, (d) any
incidental or consequential damage(s) caused by or resulting from a
defect in material or workmanship or other equipment failure, (e)
any damage arising from the product not being used in accordance
with the instructions provided. Your sole remedy shall be repair or
replacement as herein above expressed. Under no circumstances
shall MRC be liable for any losses or damage, direct or
consequential, arising out of the use of or inability to use this MRC
product. No implied warranty shall continue beyond the three years
from the date of purchase. Further, any modification, alteration, or
tampering with the MRC product or any repair other than that done
at the factory automatically voids the warranty.
4. Notice: Some states do not allow limitations on how long an implied
warranty lasts or the inclusion of limitation of incidental or
consequential damages, so the above state limitations or exclusions
may not apply to you. This warranty gives you specific legal rights
and you may have other rights which vary from state to state.
5. Customers outside the continental United States, including Hawaii,
Alaska, Canada, and Mexico, must contact MRC for return shipping
rates for both warranty and non-warranty repairs. Email us at
[e-mail]